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profile for Memming on Stack Exchange, a network of free, community-driven Q&A sites


Aug
18
comment How does strength of a pulse related to EKG(ECG)?
Great suggestions. Yes, we are interested in the normal heart. I'll test with your suggestions. Thank you.
Aug
16
comment How does strength of a pulse related to EKG(ECG)?
The paper you shared could be very useful. Thank you again.
Aug
16
comment How does strength of a pulse related to EKG(ECG)?
Thank you for the detailed response! We have a setup where surface of cortex is imaged at high speed, and the image is contaminated by the displacement of the brain. This displacement significantly varies per beat, and we want to remove the effects. EKG and the video are pretty much all we are measuring.
Aug
15
comment How does strength of a pulse related to EKG(ECG)?
Thanks for the response. Hypertrophy would be a long term effect, right? I am interested in beat-to-beat variability. Do you have a reference for this by any chance? We are sure that it is the displacement of brain due to the heartbeat, and the displacement varies from beat-to-beat. We wish to control it as much as possible, but just wondering if there are better features in ECG that can be used to do so.
Aug
14
comment How does strength of a pulse related to EKG(ECG)?
@MCM to me it's not a matter of granularity, but fundamental plausibility. I can always improve signal-to-noise ratio, and do signal processing to improve the readings. But is there any signal related to beat strength at all?
Aug
14
comment How does strength of a pulse related to EKG(ECG)?
@louism Thanks for the interest. I suspect volume would be the best, but pressure or delay could also be useful. Any reference is welcome!
Jul
13
comment What happens once a brain is full?
This answer only talks about short-term aspects, while the original question is about long-term perspectives, I think.
Jun
5
comment The distance the electromagnetic field of the heart can be detected
I heard such anecdotes from electrical engineering friends. Their circuit was so sensitive that you would see your own heart beat on the oscilloscope just in the vicinity. I don't know what the exact distance was. Perhaps you could as this Q at EE.SE electronics.stackexchange.com ?
May
15
comment Membrane potential after exposure to glutamate
peak is positive, but it won't be positive for a long time. the question is ambiguous in that aspect...
May
15
comment Membrane potential after exposure to glutamate
positive membrane potential cannot be maintained...
May
6
comment How does an axon “know” it's not connecting to its own neuron?
@Lennart_96 I'm not a particular expert on neurodevelopment, but it seemed to me that they pretty much grew in many random directions. There were no extracellular matrix or chemicals that would give an overall structural guide to the neurons (though there were glia multiplying simultaneously).
May
6
comment How do cats shed their fur?
I would agree if it were only for OP. But what about all the other people who come to Bio.SE to get an answer to this question? For the health of this community, I think having a tiny bit more detail would be a good thing.
May
5
comment How does an axon “know” it's not connecting to its own neuron?
@Lennart_96 that study was done with dissociated cortical culture; they formed random connections. (I happened to work with both authors, and did some modeling study myself, but not on the neurodevelopment side.)
May
5
comment How do cats shed their fur?
It would be extra helpful if you could summarize the content of the links in your response. :)
May
5
comment How does an axon “know” it's not connecting to its own neuron?
Can you give us citations on the study you mentioned?
May
4
comment Is there a name for this principle in biological contexts?
conditional probability?
Apr
8
comment Is tactile perception two-dimensional or three-dimensional?
@Anixx en.wikipedia.org/wiki/Vertical_sound_localization combined with other cues, not perfectly, but possible.
Apr
8
comment Is tactile perception two-dimensional or three-dimensional?
@Anixx but you can. Head transfer function and prior knowledge. It's mathematically possible, although not always the case.
Apr
3
comment What is the energy consumption of the brain?
The cortical activity pattern is measurably different between rest and sleep states. I think there would be measurable differences.
Apr
3
comment What is the energy consumption of the brain?
One ref for the breakdown of energy costs: Laughlin, S. (2001). Energy as a constraint on the coding and processing of sensory information. Current Opinion in Neurobiology, 11(4):475-480.